WO2017059242A1 - Lamelles hybrides et procédés de formation d'une bande de roulement de pneumatique - Google Patents
Lamelles hybrides et procédés de formation d'une bande de roulement de pneumatique Download PDFInfo
- Publication number
- WO2017059242A1 WO2017059242A1 PCT/US2016/054763 US2016054763W WO2017059242A1 WO 2017059242 A1 WO2017059242 A1 WO 2017059242A1 US 2016054763 W US2016054763 W US 2016054763W WO 2017059242 A1 WO2017059242 A1 WO 2017059242A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tread
- groove
- lateral
- thickness
- length
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/032—Patterns comprising isolated recesses
- B60C11/0323—Patterns comprising isolated recesses tread comprising channels under the tread surface, e.g. for draining water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1218—Three-dimensional shape with regard to depth and extending direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1222—Twisted or warped shape in the sipe plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
- B60C11/1281—Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1353—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove bottom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1369—Tie bars for linking block elements and bridging the groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
- B60C2011/1277—Width of the sipe being narrow, i.e. less than 0.3 mm
Definitions
- This invention relates generally to tire treads, and more particularly, tire treads having void features providing improved tire rolling resistance without degrading certain other tire performance measures.
- Particular embodiments of the present invention include tire treads having a plurality of lateral void features and a methods for forming a tire tread having a plurality of lateral void features.
- a tire tread having a plurality of lateral void features and methods for forming the same include a tread comprising a length extending in a lengthwise direction, the lengthwise direction being a circumferential direction when the tread is arranged on a tire, a width extending in a lateral direction, the lateral direction being perpendicular to the lengthwise direction, and a thickness extending in a depthwise direction from an outer, ground-engaging side of the tread, the depthwise direction being perpendicular to both the lengthwise direction and the widthwise direction of the tread.
- the plurality of lateral void features each have a length extending primarily in the lateral direction of the tread, where the plurality of lateral void features are spaced apart in the lengthwise direction of the tread, and where each of the plurality of lateral void features include a groove portion and a sipe portion.
- the groove portion forms a groove and the sipe portion forms a sipe and each of the groove portion and the sipe portion are located at different locations along the length of the lateral void feature.
- the particular embodiments of the present invention further comprise a submerged groove arranged at a bottom of each of the plurality of lateral void features and/or where each of the plurality of lateral void features includes a groove bumper.
- the submerged groove has a length extending along the length of each corresponding lateral void feature and is spaced apart from the outer, ground-engaging side of the tread by a portion of the tread thickness.
- the groove bumper comprises a protrusion that extends substantially across the width of the groove portion to prevent the groove from collapsing or closing during tire operation.
- the groove bumper includes a sipe arranged at a location along the length of the protrusion and extends across the full width and height of the protrusion to form a discontinuity across a cross-section of the bumper.
- FIG. 1 is a partial top view of a tire tread showing a plurality of tread blocks separated by lateral void features and longitudinal grooves, the longitudinal grooves separating the plurality of tread blocks into five separate ribs, in accordance with an embodiment of the invention.
- FIG. 2 is a perspective view of a lateral void feature depicting the volume of void associated with a shoulder lateral void feature as contained in the tread of FIG. 1, in accordance with a particular embodiment of the invention.
- FIG. 3 is a perspective view of a lateral void feature depicting the volume of void associated with an intermediate lateral void feature as contained in the tread of FIG. 1, in accordance with a particular embodiment of the invention.
- FIG. 4 is a perspective view of a lateral void feature depicting the volume of void associated with a center lateral void feature as contained in the tread of FIG. 1, in accordance with a particular embodiment of the invention.
- FIG. 5 is a cross-sectional view of a sipe portion taken along line 5-5 in FIG.
- FIG. 6A is a perspective view of an alternative lateral void feature, in accordance with a particular embodiment of the invention.
- FIG. 6B is a perspective view of an alternative lateral void feature, in accordance with a particular embodiment of the invention.
- FIG. 6C is a perspective view of an alternative lateral void feature, in accordance with a particular embodiment of the invention.
- FIG. 6D is a perspective view of an alternative lateral void feature, in accordance with a particular embodiment of the invention.
- FIG. 6E is a sectional view of the alternative lateral void feature shown in FIG. 6D, taken along line 6E-6E, in accordance with a particular embodiment of the invention.
- the present invention includes methods for forming a tire tread, tire treads, and tires including said treads, where any such tread includes a plurality of lateral void features, where each of the lateral void features include a groove and a sipe arranged at different locations along the length of the lateral void feature.
- lateral void features By virtue of employing the lateral void features discussed herein, traditional lateral grooves are combined with sipes to form a single tread void feature - a lateral void feature. In doing so, in lieu of using traditional lateral grooves, the resulting tread has increased compressive rigidity (as a result of a reduced Poisson effect) which aids in improving rolling resistance, while also improving performance in dry braking and wear performance and without significantly impacting other performance measures, such as snow traction and wet braking, for example.
- the mold member exhibits increased durability by connecting the thicker groove-forming portion to the thinner sipe-forming portion, as the sipe-forming member alone is typically less durable as it is characterized as being relatively thin.
- the sipe-forming portion may be made even thinner, where thinner sipes offer various performance benefits in the resulting tire tread.
- each such tread includes a length, width, and thickness.
- the length extends in a lengthwise direction.
- the tread may be formed with the tire, or separately for later installation on the tire, such as during retreading operations, for example, the lengthwise direction of the tread is a circumferential (that is, annular) direction when the tread is arranged on a tire.
- the width extends in a lateral direction, the lateral direction being perpendicular to the lengthwise direction, while the thickness extends in a depthwise direction from an outer, ground- engaging side of the tread, the depthwise direction being perpendicular to both the lengthwise direction and the widthwise direction of the tread.
- such methods include molding a plurality of lateral void features.
- each of the discontinuities are lateral void features
- each of the plurality of lateral void features have a length extending primarily in the lateral direction of the tread.
- each lateral void feature extends in a lengthwise direction that on average extends primarily in the lateral direction of the tread, where primarily connotes that when separating the average lengthwise direction of the lateral void feature into a lateral vector and a longitudinal vector, where the lateral vector extends completely in the lateral direction of the tread and is perpendicular to the longitudinal vector, which extends in the longitudinal direction of the tread, the lateral vector is greater than the longitudinal vector.
- the average lengthwise direction of the lateral void feature is extends in a direction biased from the lateral direction of the tread in direction of the tread length.
- the plurality of lateral void features are spaced apart in the lengthwise direction of the tread.
- each of the plurality of lateral void features formed in such methods include a groove portion and a sipe portion.
- the groove portion is a groove (that is, a lateral groove) and the sipe portion is a sipe (that is, a lateral sipe), the groove or groove portion having a thickness that is greater than a thickness of the sipe or sipe portion.
- Each of the groove portion and the sipe portion are located at different locations along the length of the lateral void feature and are in fluid communication with each other, by virtue of being a part of the same discontinuity.
- each lateral void feature the groove portion and the sipe portion are arranged along the length of the lateral void feature and are fluidly connected as each forms a portion of the lateral void feature length.
- each lateral void feature may include two or more groove portions spaced apart along the length of the lateral void feature as desired.
- each lateral void feature may include two or more sipe portions spaced apart along the length of the lateral void feature as desired.
- Each lateral void feature may form any desired shape, size, and configuration to achieve any desired tire performance result, so long as the lateral void feature includes both a groove and a sipe. Additionally, other variations of the lateral void feature are contemplated.
- a location of increased thickness such as a groove or thickened sipe, or a location of reduced thickness, such as a sipe or narrow groove, may be connected to, or included with, any of the groove portion, transitional portion, if present, and, sipe portion.
- the thickened portion forms a submerged groove arranged at a bottom of each of the plurality of lateral void features, the submerged groove having a length extending along the full or partial length of each corresponding lateral void feature and being spaced apart from the outer, ground- engaging side of the tread by a portion of the tread thickness.
- the lateral void feature may include other features, such as stone ejectors and/or groove bumpers, for example.
- each of the plurality of lateral void features includes a groove bumper comprising a protrusion that extends substantially across the width of the groove portion, the groove bumper including a sipe arranged at a location along the length of the protrusion and extending across the full width and height of the protrusion to form a discontinuity across a cross-section of the bumper.
- a groove bumper comprising a protrusion that extends substantially across the width of the groove portion, the groove bumper including a sipe arranged at a location along the length of the protrusion and extending across the full width and height of the protrusion to form a discontinuity across a cross-section of the bumper.
- each of the plurality of lateral void features include a transitional portion extending between and connecting the groove portion and the sipe portion, the transitional portion having a variable thickness that varies along the length of the corresponding lateral void feature. It is appreciated that the variable thickness of the transitional portion is measured in a direction perpendicular to both the length and a height of the corresponding lateral void feature.
- the thicker groove tapers in some shape or form to the narrower sipe.
- This taper or transition may occur in any constant or linear manner, or in any variable or non-linear manner, as the transitional portion extends from the groove portion and to the sipe portion and/or as the transitional portion extends in the depthwise direction of the tread.
- non-linear includes curvilinear and undulating extension paths.
- each of the groove and sipe portions may each be shaped in any manner.
- each of the groove and sipe portions extend in any direction in a constant or variable manner.
- each of the groove and sipe portions have a constant cross-section taken along any one or more planes.
- the thickness of the groove portion varies across any such plane.
- the thickness of the groove portion and/or sipe portion varies linearly or non-linearly as each extends in the depthwise direction of the tread and/or as each extends along the length of the lateral void feature.
- the cross-sectional thickness of any one or both of the groove or sipe portions extends linearly or non-linearly as each extends in the depthwise direction of the tread and/or as each extends along the length of the lateral void feature.
- the sipe portion (that is, the sipe) of the lateral void feature
- the sipe portion includes a thick portion extending at least partially around a perimeter of a reduced thickness portion.
- the thick portion extends substantially or fully around the perimeter of the reduced thickness portion.
- the reduced thickness portion in certain embodiments, is 0.1 to 0.4 millimeters (mm) or less, while the thick portion is greater than 0.4 mm and up to 10 mm thick.
- the length of the thin portion is 10% to 80% of the tread block width while the length of the thick portion is 20% to 90% of the tread block width.
- the sipe portion may extend in any direction in a constant or variable manner.
- the thickness of any one or both of the thick or reduced thickness portions of the sipe portion may be constant or variable, and may vary linearly or non-linearly as each extends in the depthwise direction of the tread and/or as each extends along the length of the lateral void feature. Additionally, regardless of whether the thickness is constant or variable, in certain embodiments, the cross-sectional thickness of any one or both of the thick or reduced thickness portions of the sipe portion extends linearly or non-linearly as each extends in the depthwise direction of the tread and/or as each extends along the length of the lateral void feature.
- each of the lateral void features can be formed from one or more molding elements.
- each of the lateral void features is formed from one of a plurality of single molding elements.
- the single molding element includes a groove-forming portion for forming the groove portion and a sipe-forming portion for forming the sipe portion, the groove-forming portion and the sipe-forming portion each being located at different locations along a length of the molding element.
- the single molding element may be formed by assembling and connecting two or more components to form a unitary single molding element or may be formed of one continuous component to form a monolithic single molding element. Any known methods for forming a molding element for use in molding tire treads may be employed. For example, laser sintering techniques may be used. In certain embodiments, three dimensional (3-D) printing techniques are employed to form each single molding element.
- any lateral void feature contemplated herein may be arranged as a longitudinal void feature, to provide a plurality of longitudinal void features each having a groove portion and a sipe portion, where any lateral void feature contemplated herein is arranged to have a length extending primarily in the longitudinal direction of the tread, in lieu of extending primarily in the lateral direction of the tread.
- a tire tread 10 having a plurality of tread blocks 12 separated by longitudinal grooves 14 and lateral void features 16, the longitudinal grooves separating the plurality of tread blocks into five separate ribs Ri 0 extending in a direction of the tread length Li 0 , which is referenced as the lengthwise direction of the tread.
- the lengthwise direction is a circumferential direction when the tread is arranged on a tire, but may form any other linear or non-linear direction when the tread is formed separately from the tire and prior to installation there on.
- the tread also has a width Wio extending in a lateral direction, the lateral direction being perpendicular to the lengthwise direction Lio and a depthwise direction of the tread.
- the tread also has a thickness Tio extending in a depthwise direction from an outer, ground-engaging side OSio of the tread, the depthwise direction being perpendicular to both the lengthwise direction and the widthwise direction of the tread. Because the outer, ground-engaging side OSio is configured to engage a ground surface during tire operation, the outer, ground-engaging side includes a ground-contacting surface.
- each of a plurality of lateral void features 16 each has a length L 16 extending primarily in the lateral direction Wio of the tread 10, where the plurality of lateral void features are spaced apart in the lengthwise direction Lio of the tread. It is also shown that each of the plurality of lateral void features 16 includes a groove portion 18 and a sipe portion 20 arranged along each length Li 6, the groove portion forming a groove and the sipe portion forming a sipe. Each of the groove portion 18 and the sipe portion 20 are located at different locations along the length Li 6 of the lateral void feature 16.
- lateral void features 16-1 are arranged along a shoulder rib Rio-1 in a spaced-apart configuration between shoulder tread blocks 12-1
- lateral void features 16-2 are arranged along an intermediate rib Rio-2 in a spaced-apart configuration between intermediate tread blocks 12-2
- lateral void features 16-3 are arranged along a central rib Rio-3 in a spaced-apart configuration between central tread blocks 12-3.
- These lateral void features 16-1, 16-2, and 16-3 are shown in greater detail in FIGS. 2-4.
- FIG. 2 a perspective view of a shoulder lateral void feature 16-1 is shown as a volume of the void it forms in the tread 10 of FIG. 1.
- FIG. 3 a perspective view of an intermediate lateral void feature 16-2 is shown as a volume of the void it forms in the tread 10 of FIG. 1.
- FIG. 4 a perspective view of a central lateral void feature 16-3 is shown as a volume of the void it forms in the tread 10 of FIG. 1.
- groove portion 18 and sipe portion 20 are arranged along length Li 6 .
- central lateral void feature 16-3 has a second groove portion 18-2 spaced apart from a first groove portion 18-1, each separated by sipe portion 20.
- each lateral void feature 16 is shown to have a variable thickness Ti 6 . More so, each of groove portion 18 and sipe portion 20 have a particular thickness Tis, T2 0 (also referred to as a width), length Lis, L2 0 , and height His, H2 0 , respectively. Each such thickness extends in a direction perpendicular to the direction of the lateral void feature length Li 6 and height Hi 6 . As noted previously, in any embodiment, any groove and sipe portion may be shaped and sized in any manner desired. Accordingly, each groove and sipe portion may have any thickness, length, and height desired, each of which may be constant or variable across each respective portion.
- each sipe portion 18 has a variable thickness T2 0 . While a variable thickness may be provided by other manners, in the embodiments shown, the variable thickness is at least partially provided by the sipe portion 20 including a thicker portion 22 extending around a perimeter of a reduced thickness portion 24, the thicker portion having a thickness greater than a thickness of the reduced thickness portion. This can be more clearly observed in FIG.
- both the thicker portion 22 and the reduced thickness portion 24 are shown to have a constant thickness. Still, the thickness T22 of the thicker portion 22 extends along a linear path in both a direction of the lateral void feature length Lis and height His, while the thickness T24 of the reduced thickness portion 24 is shown to extend along an undulating path in both a direction of the lateral void feature height and length. As discussed above, other variations are contemplated and within the confines of this invention.
- a transitional portion may be arranged between the groove portion and the sipe portion.
- a transitional portion 26 has a length L2 6 extending between and connecting the groove portion 18 and the sipe portion 20.
- the transitional portion 26 has a variable thickness T 2 6 that varies along the length Li 6 of the corresponding lateral void feature.
- the variable thickness T26 is measured in a direction perpendicular to both the length Li 6 and a height Hi 6 of the corresponding lateral void feature.
- the variable thickness T26 tapers non-linearly (that is, variably) from the groove portion 18 and to the sipe portion 20.
- the height and length of the transitional portion taper linearly or non-linearly from the groove portion and to the sipe portion, whether or not the variable thickness tapers linearly or non- linearly.
- a location of increased thickness such as a groove or thickened sipe, may be connected to, or included with, any of the groove portion, transitional portion, and, sipe portion.
- a location of increased thickness 28 is connected to the sipe portion 20 at a location within the tread depth, and more specifically, at a terminal location or bottom of the sipe portion and spaced apart from the outer, ground-engaging side of the tread in a depthwise direction of the tread thickness.
- This location of increased thickness 28 forms a submerged thickened sipe or groove.
- the variable thickness T 2 6 of the transitional portion 26 varies (increases) as the transitional portion extends in the depthwise direction Tio of the tread.
- the sipe portion is centrally located across a width of the lateral void feature.
- an area of increased thickness 28 is connected to each of the groove portion 18, the transitional portion 26, and the sipe portion 20 at a location within the tread depth.
- This location of increased thickness 28 forms a thickened sipe or a groove, for example.
- the thickened portion 28 forms a submerged groove arranged at a bottom of each of the plurality of lateral void features 16, the submerged groove having a length extending along the length Li6 of each corresponding lateral void feature and being spaced apart from the outer, ground-engaging side of the tread by a portion of the tread thickness.
- the length of the submerged groove extends the substantial full length of the lateral void feature.
- a location of reduced thickness such as a sipe or narrow groove
- a location of reduced thickness 30 is connected to the groove portion 18 at a location within the tread depth, and more specifically, at a bottom or terminal location of the groove portion and spaced apart from the outer, ground-engaging side of the tread in a depthwise direction of the tread thickness.
- This location of reduced thickness 30 forms a submerged sipe or narrow groove.
- sipe portion 20 includes a thickened portion 28 similarly shown and described in association with FIG. 6B, but which now extends partially along the length of the lateral void feature.
- the variable thickness T26 of the transitional portion 26 varies (increases) as the transitional portion extends in the depthwise direction T10 of the tread.
- the lateral void feature may include other features, such as stone ejectors and/or groove bumpers, for example.
- the groove portion includes a groove bumper 32.
- the groove bumper 32 comprises a protrusion that extends substantially across the width or thickness Ti6 of a groove portion 18, to prevent the groove from collapsing or closing during tire operation.
- a sipe 34 having length L 34 may be arranged along the length L 32 of the protrusion (see FIG. 6E) and which extends across the full length L32 and height H32 of the bumper to form a discontinuity across a cross-section of the bumper when necessary to allow the molding element to be removed during demolding operations, or to reduces the tread stiffness when desired.
- a sipe 34 is arranged along the length of the protrusion, which is best observed in FIG. 6E. It is appreciated that the groove bumper may employ any sipe of any desired design, and which may be a planar or non-planar sipe. In the embodiment shown, a non- planar sipe 34 is employed, where the non-planar aspect is defined by an undulating thickness.
- FIGS. 2-4 and 6A-6E represent a lateral void feature arranged within a tread, each also represents a single molding element for forming the lateral void feature shown in the respective figure, since the void formed is a direct representation of the molding element used to form said void.
- any tread discussed herein may be arranged along an annular pneumatic tire, or may be formed separately from a tire as a tire component for later installation on a tire carcass, in accordance with any technique or process known to one of ordinary skill in the art.
- the treads discussed and referenced herein may be molded with a new, original tire, or may be formed as a retread for later installation upon a used tire carcass during retreading operations. Therefore, when referencing the tire tread, a longitudinal direction of the tire tread is synonymous with a circumferential direction of the tire when the tread is installed on a tire.
- a direction of the tread width is synonymous with an axial direction of the tire or a direction of the tire width when the tread is installed on a tire.
- a direction of the tread thickness is synonymous with a radial direction of the tire when the tread is installed on a tire. It is understood that the inventive tread may be employed by any known tire, which may comprise a pneumatic or non- pneumatic tire, for example.
- any of the tread features discussed herein may be formed into a tire tread by any desired method, which may comprise any manual or automated process.
- the treads may be molded, where any or all discontinuities therein may be molded with the tread or later cut into the tread using any manual or automated process.
- any one or both of the pair of opposing discontinuities may be originally formed along, and in fluid communication with, the outer, ground-engaging side of the tread, or may be submerged below the outer, ground-engaging side of the tread, to later form a tread element after a thickness of the tread has been worn or otherwise removed during the life of the tire.
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Abstract
La présente invention concerne des bandes de roulement de pneumatique dotées d'une pluralité de vides latéraux et concerne également des procédés de formation d'une bande de roulement de pneumatique dotée d'une pluralité de vides latéraux. Chacun des vides latéraux des bandes de roulement de pneumatique a une longueur qui s'étend principalement dans la direction latérale de la bande de roulement et chacun des vides latéraux de la pluralité de vides latéraux comprend une partie de rainure (18) et une partie de lamelle (26). Une rainure immergée (28) est placée au niveau de la partie inférieure de chaque vide de la pluralité de vides latéraux. En outre ou en alternative, chacun des vides latéraux de la pluralité de vides latéraux est doté d'un pare-chocs de rainure (32).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US15/764,768 US20180272637A1 (en) | 2015-09-30 | 2016-09-30 | Hybrid sipes and methods for forming a tire tread |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2015/053265 WO2017058209A1 (fr) | 2015-09-30 | 2015-09-30 | Lamelles hybrides et procédés pour former une bande de roulement de pneu |
USPCT/US2015/053265 | 2015-09-30 |
Publications (1)
Publication Number | Publication Date |
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WO2017059242A1 true WO2017059242A1 (fr) | 2017-04-06 |
Family
ID=54266696
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2015/053265 WO2017058209A1 (fr) | 2015-09-30 | 2015-09-30 | Lamelles hybrides et procédés pour former une bande de roulement de pneu |
PCT/US2016/054763 WO2017059242A1 (fr) | 2015-09-30 | 2016-09-30 | Lamelles hybrides et procédés de formation d'une bande de roulement de pneumatique |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2015/053265 WO2017058209A1 (fr) | 2015-09-30 | 2015-09-30 | Lamelles hybrides et procédés pour former une bande de roulement de pneu |
Country Status (2)
Country | Link |
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US (1) | US20180272637A1 (fr) |
WO (2) | WO2017058209A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111902298A (zh) * | 2018-03-16 | 2020-11-06 | 大陆轮胎德国有限公司 | 肋状或鳍状元件、花纹圈区段和产生花纹圈区段的方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017058224A1 (fr) | 2015-09-30 | 2017-04-06 | Compagnie Generale Des Etablissements Michelin | Caractéristiques du type structure alvéolée pour lamelles |
WO2017058226A1 (fr) | 2015-09-30 | 2017-04-06 | Compagnie Generale Des Etablissements Michelin | Lamelles d'épaisseur variable |
JP6819774B2 (ja) * | 2018-03-26 | 2021-01-27 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP7418197B2 (ja) * | 2019-12-13 | 2024-01-19 | Toyo Tire株式会社 | 非空気圧タイヤ |
WO2024049797A1 (fr) * | 2022-08-29 | 2024-03-07 | Compagnie Generale Des Etablissements Michelin | Lamelle de pneu ondulée pour des performances de pneu améliorées et fabrication de moule économique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002038399A2 (fr) * | 2000-11-13 | 2002-05-16 | Societe De Technologie Michelin | Bande de roulement de pneumatique et element moulant de moule d'une telle bande |
FR2950565A1 (fr) * | 2009-09-29 | 2011-04-01 | Michelin Soc Tech | Bande de roulement pour pneu de rigidite amelioree |
WO2012058171A1 (fr) * | 2010-10-29 | 2012-05-03 | Michelin Recherche Et Technique S.A. | Bande de roulement de pneu présentant plusieurs couches d'usure |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02303908A (ja) * | 1989-05-18 | 1990-12-17 | Toyo Tire & Rubber Co Ltd | 幅の異なる部分を有するサイプを備えた空気入りタイヤ |
-
2015
- 2015-09-30 WO PCT/US2015/053265 patent/WO2017058209A1/fr active Application Filing
-
2016
- 2016-09-30 US US15/764,768 patent/US20180272637A1/en not_active Abandoned
- 2016-09-30 WO PCT/US2016/054763 patent/WO2017059242A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002038399A2 (fr) * | 2000-11-13 | 2002-05-16 | Societe De Technologie Michelin | Bande de roulement de pneumatique et element moulant de moule d'une telle bande |
FR2950565A1 (fr) * | 2009-09-29 | 2011-04-01 | Michelin Soc Tech | Bande de roulement pour pneu de rigidite amelioree |
WO2012058171A1 (fr) * | 2010-10-29 | 2012-05-03 | Michelin Recherche Et Technique S.A. | Bande de roulement de pneu présentant plusieurs couches d'usure |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111902298A (zh) * | 2018-03-16 | 2020-11-06 | 大陆轮胎德国有限公司 | 肋状或鳍状元件、花纹圈区段和产生花纹圈区段的方法 |
CN111902298B (zh) * | 2018-03-16 | 2023-10-27 | 大陆轮胎德国有限公司 | 肋状或鳍状元件、花纹圈区段和产生花纹圈区段的方法 |
Also Published As
Publication number | Publication date |
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US20180272637A1 (en) | 2018-09-27 |
WO2017058209A1 (fr) | 2017-04-06 |
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